CN105036223B - High-efficiency energy-saving sewage treatment method and device - Google Patents
High-efficiency energy-saving sewage treatment method and device Download PDFInfo
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- CN105036223B CN105036223B CN201510525708.3A CN201510525708A CN105036223B CN 105036223 B CN105036223 B CN 105036223B CN 201510525708 A CN201510525708 A CN 201510525708A CN 105036223 B CN105036223 B CN 105036223B
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Abstract
The invention discloses a method and device, which are used for harmlessly treating industrial sewage, can sufficiently utilize heat energy in the treatment process and can repeatedly utilize a water resource and other industrial products. The sewage treatment method comprises: first preheating to-be-treated sewage to a set temperature, then sending the sewage into an MVR evaporator, evaporating and concentrating the sewage to respectively obtain concentrated liquid and secondary steam, obtaining a treated solution when the concentration of concentrated liquid in the MVR evaporator reaches a predetermined value, introducing the treated solution into a forced circulating evaporator, and re-evaporating and concentrating the treated solution. By adopting the device, the method can be implemented, sewage can be effectively and efficiently treated, the off-line cleaning time of the device can be greatly shortened, the equipment is simpler to re-clean, and the equipment cost can be maximally reduced.
Description
Technical field
It is particularly a kind of black to life or industrial high-salt wastewater and paper industry the present invention relates to a kind of to trade effluent
Liquid waste water carries out harmless treatment and can make full use of heat energy in processing procedure, and can be to water resource and other industrial products
The method and device for being reused.The method that the method for the present invention employs mechanical forced circulating and evaporating, will be pending
Sewage be preheating to after design temperature to send into and be evaporated concentration in MVR evaporators, respectively obtain the liquid of concentration and secondary steaming
Vapour, obtains liquid to be treated after the concentrate concentration in MVR evaporators reaches predetermined value, and liquid to be treated introduces forced-circulation evaporation
Device carries out re-evaporation concentration, concentrated liquid is respectively obtained the sewage and indirect steam for concentrating again after further concentrating, and forces to follow
The light foul condensate that indirect steam in ring evaporator is formed delivers to light foul condensate groove direct reuse.Wrapped in device of the invention
Include：Successively mutually with preheater, MVR, the forced-circulation evaporator of pipeline serial communication, with foregoing each preheater, evaporator,
Heater, vaporization chamber use the condensate water pot of pipeline connection, the vapour compression machine of MVR respectively, and are arranged at MVR, each condensed water
Pump and valve and control system on tank, heating chamber pipeline.
Background technology
Water is the indispensable natural resources of human survival and development, is the cradle of origin of life, is any other material
Irreplaceable material base.China is the serious country of arid, water shortage more than, recently as industrial hair
Exhibition, the demand for water resource continues to increase, and the fact that extensive economy development model ignores fresh water resources shortage in China again,
Other environmental pollution states are not administered not only at all, there is the trend for progressively aggravating on the contrary.Therefore water scarcity contradiction
To more be highlighted within following one period with pollution pressure.Trade effluent is taken appropriate measures and administers Posterior circle profit
With, it is to improve the difficult a kind of effective means of living environment, solution water, the method that can be used has a lot, but with regard to current
Speech, investment and operating cost are minimum, technical merit highest, regulation effect method the most significant still use the way of distillation.Tradition
Administer sewage the way of distillation using multi-stage evaporator series connection by the way of, due to it possess mode of operation it is simple, it is reliable steadily
Many advantages, such as, therefore be widely used.But need to use coal-burning boiler in the middle of traditional vapo(u)rization system running
A large amount of power steams are provided, coal will carry out desulfurization process, dust secondary pollution is caused in combustion process, give off before combustion
The carbon dioxide of Coal-fired capacity is several times as much as, global warming gap effect is caused.The fresh steaming that wherein I effect evaporator is produced using boiler
Used as heat source, each effect evaporator thereafter indirect steam successively produced by upper 1st effective evaporator is used as heating warm for vapour
Source, end effect secondary steam is condensed into distilled water into condenser, completes whole evaporation process.For condensing end effect secondary steam
Industrial rinse dosage and outfit number of devices are a lot, and a big chunk heat is wasted, it is impossible to obtain Efficient Cycle profit
With it is higher so to result in equipment energy consumption, and operating cost is increased and the problems such as environmental pollution.
Meanwhile, for reducing energy consumption, utilization efficiency of heat energy being improved, traditional vapo(u)rization system in most cases all uses multiple-effect
The combination of evaporator, so just causes that whole system number of devices is various, occupied ground increases, control system is complicated.And
When evaporator imitates number increase to a certain extent, because effective temperature difference reduces, temperature loss increases Multi-effect evaporator system, evaporates
Intensity declines, and often increasing 1st effective evaporator will pay great equipment investment, and energy-saving effect no longer improves significantly,
So between the evaporator effect number of substantially vapo(u)rization system is all imitated five to seven at present, further being improved in traditional vapo(u)rization system
The target of efficiency of energy utilization is absorbed in technical bottleneck, and under current situation, energy-saving index cannot be completed.
MVR evaporators are used as a kind of new evaporation equipment in recent years, due to its to traditional vapo(u)rization system technique, principle and
Mode is thoroughly changed, and is substantially reduced the various thermal loss in system, be make use of various effective heat energy, takes machine
Tool is done work and obtains high-quality thermal source, and coal-burning boiler offer steam need not be reused in normal operation, is changed into and is used
The clean energy resourcies such as electric power, with obvious energy conservation and consumption reduction effects, integration of equipments degree is high, floor space is greatly reduced, automatically
Control system is simple, the advantage not available for the low traditional evaporation equipment of cost of investment, therefore has been obtained extensively in different industries
Application.For example disclosed in Chinese invention patent 201410271604X a kind of dyestuff intermediate para-ester produces the treatment of waste water
Disclosed in method, Chinese invention patent 2011102333975 it is a kind of process the highly concentrated industrial wastewater treatment of wastes with processes of wastes against one another of high salt method, in
A kind of Waste Water Treatment employs MVR evaporation equipments disclosed in state's utility model patent.
But in the middle of actually used process, itself some intrinsic shortcoming is also highlighted, main realization is：
First, MVR evaporators are suitable only for low concentration, the evaporation of low viscous solution, are reached necessarily when by evaporation solution concentration
During degree, because the increase of its viscosity, mobility are deteriorated, it will form incrustation scale on heat exchange element surface, the solid content in solution is not
Thereon, heat exchange efficiency drastically declines for disconnected attachment, has blocked heat exchange, and evaporation is difficult to persistently carry out.Therefore, its application field is generally
The situation of the big evaporated water of low concentration, the solution evaporation for higher concentration and viscosity is then helpless.But actual production should
In, the material condition of certain special trait is needed or realizes in order to reach certain specific technique, then needing will be pending molten
Liquid is concentrated to the state with high concentration, to realize set process goal, reduces integrated application cost.In fact, in this condition
Under state, the energy ezpenditure that system needs is simultaneously few, conversely, the economic benefit brought and process conditions are very considerable,
But, MVR vapo(u)rization systems cannot further realize concentrate target.
Although the 2, can be set from stripper plant in MVR evaporators, obtained second distillation condensed water will be evaporated with light
Foul condensate and weight foul condensate form discharge respectively, under normal circumstances light foul condensate tank COD contents 350mg/L with
Under, the use standard of industrial water is reached, the journey that can directly flow back is used；But weight foul condensate COD contents typically all exist
4000mg/L even more highs, do not reach industrial water and use standard, and next step cannot be carried out to it by MVR itself vapo(u)rization systems
Treatment, it is impossible to fully recovering and zero emission requirement after realization treatment.
Therefore, MVR vapo(u)rization systems are an evaporation elements, its adapted to by evaporation solution be low concentration, low viscosity,
The adaptability of technique is not high in the middle of actually used process, it is impossible to which complete independently factory needs.
In traditional multi-effect evaporation system, general widely used stripper processes underproof heavy foul condensate, enters
The power source of stripper treatment weight foul condensate is boiler live steam, by the steam of stripper by some incoagulable gas and
Organic Pollution in certain effect evaporator, it is necessary to individually set up one group of heat-exchange system to apply the steam of stripper and form lasting
The system dynamic of work.Because traditional vapo(u)rization system equipment effect number is more, technique expanded range is wide, by changing for stripper discharge steam
Thermal element system can be processed and applied using system process conditions in itself.But, current MVR vapo(u)rization systems are one
Single evaporation element, does not possess the process conditions that treatment stripper discharges steam so that MVR vapo(u)rization systems and stripping system are not
Can organically be combined.
Meanwhile, the characteristics of can reach resistance to salting-out, ant-scaling using forced-circulation evaporator, can turn into waste liquid concentration can
With the state of the treatment that separates or burn.But, often forced-circulation evaporation is closed from into multistage evaporation system using front and rear level
System and end vacuum system are operated, it is difficult to and MVR vapo(u)rization systems have obtained unit in terms of temperature, pressure and energy balance
Close and match.
The content of the invention
The present invention provides one kind can overcome prior art not enough, by stripping system, forced-circulation evaporation system and MVR systems
Organic assembling, is played respective advantage, the method and device of sewage disposal is carried out using evaporation process mode.
This sewage water treatment method of the invention is：MVR is sent into after pending sewage is preheating into design temperature first
Concentration is evaporated in evaporator, the liquid and indirect steam of concentration is respectively obtained, treats that the concentrate concentration in MVR evaporators reaches
Liquid to be treated is obtained after to predetermined value, liquid to be treated introduces forced-circulation evaporator and carries out re-evaporation concentration, enters concentrated liquid
The sewage and indirect steam for concentrating again are respectively obtained after the concentration of one step, the light dirt that the indirect steam in forced-circulation evaporator is formed
Condensed water delivers to light foul condensate groove direct reuse, and MVR heats up the steam after pressurizeing through vapour compression machine in MVR steamings in the present invention
Light foul condensate is formed in hair device, the light foul condensate is drawn from MVR evaporator heat exchange elements and is used as the pending dirt of heating
Directly returned after the heat exchange thermal source of water and used, remaining gas carries out steam stripping, form the mixture of weight sewage and fixed gas, no
The mixture of solidifying gas forms weight sewage after condensing again and treats further treatment；Liquid to be treated at least carries out effect forced circulation steaming
Hair treatment, the final concentrated liquid of the technological requirement for obtaining, the indirect steam that liquid to be treated is produced through forced-circulation evaporation treatment
Liquid stripping is carried out as dynamic medium；The indirect steam discharged after being stripped through liquid obtains the dirty solidifying water of weight and steams through steam stripping
Vapour is stripped after forming weight sewage mixing and stripped into liquid.
Preferably with two effect above forced-circulation evaporation treatment in sewage water treatment method of the invention, wherein I effect pressure is followed
Ring evaporation thermal source uses live steam, the indirect steam that previous effect forced-circulation evaporation treatment is produced to be used as latter effect forced circulation
The evaporation thermal source of evaporation, the indirect steam that final effect forced-circulation evaporation treatment is produced is used as the steam stripped dynamic medium of liquid.
Sewage-treatment plant of the invention, including：Successively mutually with preheater, MVR, the forced circulation of pipeline serial communication
Evaporator, with foregoing each preheater, evaporator, heater, vaporization chamber respectively with the condensate water pot of pipeline connection, the steaming of MVR
Vapour compressor, and pump and valve, control system on MVR, each condensate water pot, heating chamber pipeline are arranged at, etc..In the present invention
In, use pipeline connection between the indirect steam of MVR evaporators and the entrance of vapour compression machine；The outlet of vapour compression machine is steady with steam
Pipeline connection is used between the indirect steam entrance for pressing tank；The live steam entrance of steam vacuum tank is connected with live steam pipe network（Carry
For starting steam）, connected with pipeline between steam vacuum tank and MVR heaters；The fixed gas of forced-circulation evaporator heating chamber
Outlet is connected with vaporization chamber；The condensating water outlet tube of forced-circulation evaporator heating chamber is connected with cleaning condensate water pot respectively；
Pipeline connection is used between the indirect steam outlet of forced-circulation evaporator and the steam inlet tube of liquid stripper；In the steaming of MVR
Whole heat exchange area is divided into one stripping zone of setting the heavy contraminated zone on top and the light sewage of bottom in sending out the heat exchange element of device
Area, wherein：Weight contraminated zone top and surface condenser fixed gas inlet tube between with pipeline connection, weight contraminated zone bottom with
Pipeline connection is used respectively between the steam outlet pipe and weight dirt drainer of liquid stripper；The heavy sewage of weight foul condensate heater goes out
Mouth is connected with the heavy sewage inlet on liquid stripper top, and the light foul condensate outlet and weight foul condensate of liquid stripper add
Pipeline connection, heavy sewage inlet and the weight foul condensate groove of weight foul condensate heater are used between the light foul condensate inlet tube of hot device
Between use pipeline connection, uses pipeline connection between the light foul condensate outlet for the treatment of sewage preheater and light foul condensate groove；Surface
Condenser warm water outlet and cooling water inlet respectively be that warm water collecting pipe and clear water supply pipe are connected, surface condenser it is cold
Solidifying water out and weight foul condensate tank pipeline connection；The liquor inlet and material liquid outlet for the treatment of sewage preheater respectively with treat
Treatment sewage feeder sleeve is connected with MVR evaporator circulating pumps, and the condensing water inlet and condensed water for the treatment of sewage preheater go out
Mouth is respectively communicated with the light foul condensate tank and light foul condensate groove of MVR.
Sewage-treatment plant of the invention, can also be is including：Successively mutually with the preheater of pipeline serial communication,
MVR, forced-circulation evaporator, with foregoing each preheater, evaporator, heater, vaporization chamber respectively with the condensation of pipeline connection
Water pot, the vapour compression machine of MVR, and it is arranged at pump and valve, control system on MVR, each condensate water pot, heating chamber pipeline
Deng outside, pipeline connection is used between the indirect steam of its MVR evaporator and the entrance of vapour compression machine；The outlet of vapour compression machine with
Pipeline connection is used between the indirect steam entrance of steam vacuum tank；The live steam entrance of steam vacuum tank connects with live steam pipe network
It is logical, there is provided system starts steam, is connected with pipeline between steam vacuum tank and MVR heaters；Forced-circulation evaporator heating chamber
Fixed gas outlet connected with vaporization chamber；The condensating water outlet tube of forced-circulation evaporator heating chamber respectively with cleaning condensed water
Tank is connected；I effect forced-circulation evaporator is connected with live steam pipe, it is previous imitate forced-circulation evaporator secondary steam pipe with it is rear
The heater of the evaporator of one effect forced-circulation evaporation is connected, the secondary steam pipe and liquid of final effect forced-circulation evaporator
Pipeline connection is used between the steam inlet tube of stripper；A gas stripping zone is set in the heat exchange element of the evaporator of MVR will
Whole heat exchange area is divided into the heavy contraminated zone on top and the light contraminated zone of bottom, wherein：The top in weight contraminated zone is cool with surface solidifying
With pipeline connection, the dirty condensation of the steam outlet pipe and weight of the bottom in weight contraminated zone and liquid stripper between the fixed gas inlet tube of device
Pipeline connection is used between tank respectively；The heavy outlet of sewer of weight foul condensate heater connects with the heavy sewage inlet on liquid stripper top
It is logical, connected with pipeline between the light foul condensate outlet of liquid stripper and the light foul condensate inlet tube of weight foul condensate heater
It is logical, pipeline connection is used between the heavy sewage inlet and weight foul condensate groove of weight foul condensate heater, treatment sewage preheater
Pipeline connection is used between light foul condensate outlet and light foul condensate groove；The warm water outlet of surface condenser and cooling water inlet difference
Be that warm water collecting pipe and clear water supply pipe are connected, the condensation-water drain of surface condenser and weight foul condensate tank are connected with pipeline
It is logical；The liquor inlet and material liquid outlet for the treatment of sewage preheater are circulated with treatment sewage feeder sleeve and MVR evaporators respectively
Pump is connected, the condensing water inlet and condensation-water drain for the treatment of sewage preheater be respectively communicated with MVR light foul condensate tank and
Light foul condensate groove.
In embodiment as device of the invention, its forced-circulation evaporator is shared using two heaters of homalographic
One structure allocating method of vaporization chamber.It is at present a pressure for the conventional arrangement and frame mode of forced-circulation evaporator
Circulating evaporator is made up of single heater and vaporization chamber, i.e., man-to-man matching way, when heater heat exchange in-tube fouling
Compare to have a strong impact on when using and shut down whole vapo(u)rization system, system temperature dismantles heater after returning to relatively low working condition
The bobbin carriage at two ends, then carries out mechanical cleaning by heat exchanger tube using mechanical system by root.This structure configuration and cleaning way are use up
Pipe can reach cleaning performance, but cleaning labour intensity is big, the time is long, expense and human cost that long-time system-down is caused
For enterprise increased many burdens, start consumed steam, electric power etc. is sufficiently expensive every time, increased system operation cost,
Reduce the effective rate of utilization of equipment.The present invention shares a structure outfit side for vaporization chamber using two heaters of homalographic
The matching way of formula, i.e., two couple, solving fouling cleaning needs the defect of system-down.In practical operation, work as heat exchanger tube
When fouling has a strong impact on heat exchange, only wherein one heater need to be switched to cleaning model, be followed online using the hot water in system
Ring is cleaned, and another heater is in normal working condition, and now running efficiency of system decreases, but can also be just
Often work, meets the basic need of production, and cleaning need not send and manually remove device for disassembling, and scavenging period is shorter, cleaning way
Simply, state is continuous, relative to the loss caused by system-down, can almost disregard.Work is cut into after line fast cleaning
Make environment, that is, complete cleaning process.
The stripping zone for being set in the heat exchange element of the evaporator of MVR in the present invention can be changed in the evaporator of MVR
Evaporating area along L-shaped soldering, is formed a stripping segmentation soldering line by the top of thermal element, is made using this stripping segmentation soldering line
Evaporating area is divided into superposed stripping zone and the light foul condensate area positioned at bottom.The present invention is preferably to make the face of stripping zone
Product accounts for the 10-20% of the evaporating area plate gross area.
Steam medium crossfire can be unavoidably produced in device busy of the invention, is produced particularly in condensate water pipeline system general
Raw steam medium crossfire, this can cause the change of pressure in system, cause the normal work of influence whole device.To this problem
Common solution is that pressure maintaining valve is being added on corresponding pipeline, and a kind of structure of present invention offer is more simple, low cost
It is honest and clean, and more appropriate, reliable technical solution, i.e., apparatus of the present invention each condensate water pot introducing condensed water pipeline
At least one U section of upper setting, the bottom of the bottom less than condensate water pot of its U-shaped.By the condensable water of this measure corresponding
Area stay, forms one section of sealing area of full packages water column, prevents steam medium crossfire in evaporator and causes system pressure
Change fluctuation.
Can also be horizontally disposed with for the heating chamber of each forced-circulation evaporator by device of the invention.As a result of horizontal installation
Form, easily can set dividing plate in bobbin carriage and the flowing by heated liquid medium in it is divided into many journeys, significantly
The flow of circulating pump is reduced, so as to reduce operating power consumption.
Driven by power 10KV high-voltage motors are used in the present invention, gear-box and vapour compression machine are sequentially connected, using machine
Tool acting will be sent in MVR evaporators after indirect steam intensification, pressurization and be used as evaporation thermal source.Use 10KV high-voltage motors and be for
Using clean energy resource, operational efficiency is improved, reduce operating current, reduce material and facility and invest and operating cost；Using tooth
Roller box is in order that the running speed between high-voltage motor and vapour compression machine obtains matching and transmitting torque.In this configuration state
Under, the pending waste liquid of low concentration is sent to MVR evaporators first, when pending evaporation liquid is in evaporator internal circulation flow
When, first preheat to being passed through afterheat steam or live steam in evaporator, when constantly being participated in exchanging heat and then reaching boiling point by evaporation liquid
When, steam off pipeline valve starts high-voltage motor and drives vapour compression machine work.Now indirect steam through vapour compression machine with
Mechanical work is compensation, is absorbed heat from low temperature environment around, obtains elevated pressures, temperature and enthalpy and high-quality, high energy position
Steam, return for evaporator heat loss and supplement input and output material heat content, in evaporator produce heat exchange and undergo phase transition,
Light foul condensate and weight foul condensate are respectively become, wherein light foul condensate is stored up after its waste heat is made full use of in stoste preheater
It is stored in direct reuse in light foul condensate groove；Weight foul condensate is sent to pending in weight foul condensate groove.And in evaporator
Liquid is heated boiling again, produces new steam, then through vapour compression machine compressed action, reciprocation cycle completes evaporation process.
Hereafter in the middle of normal operation, the initial steam of boiler offer, MVR systems are not used when generally vapour compression machine works
To voluntarily circulate, reduce boiler combustion process, it is to avoid the pollution such as smoke evacuation, blowdown, also reduce while energy-saving and
The disposal of pollutants and greenhouse gases effect produced during primary energy consumption are reduced, the thermal efficiency is high, and energy conservation and consumption reduction effects are bright
It is aobvious.
Pending waste liquid is constantly concentrated in MVR evaporators, by evaporation be separated into substantial amounts of condensed water and it is a small amount of compared with
High-concentration waste liquid.The characteristics of MVR evaporator operational efficiency is high, use cost is low is so taken full advantage of, at most of waste liquid
Reason is completed in MVR evaporators.Now waste liquid total amount very little.
The present invention circulating by the principle of circulating pump additionaling power by evaporation liquid using forced-circulation evaporator, makes
By evaporation liquid in heater heat exchanger tube with speed forced flow higher, heater evaporates and separates only as heating process
Process is carried out in vaporization chamber, so as to reach resistance to salting-out, the purpose of ant-scaling.Now again by a small amount of higher concentration waste liquid from
To deliver to continue in II effect forced-circulation evaporator in MVR evaporators and evaporate, further concentration.Concentration is re-fed into afterwards to a certain extent
Final concentration is done to I effect forced-circulation evaporator.For example using the method for the present invention and device treatment paper waste, now
Waste liquid has been concentrated into separate or directly carrying out the state of burning treatment.
The present invention sets single steam inlet in the heat exchange element stripping zone of Conventional plate-type evaporator, and by stripper
Discharge steam be passed through in it, weight foul condensate, discharge quantity of steam and the MVR loss of stripper are formed after exchanging heat in this region
Energy and supplement energy obtain equilibrium relation, form organic system.Meanwhile, forced-circulation evaporator is set to two effects, wherein I effect
Forced-circulation evaporator thermal source uses afterheat steam or fresh Boiler Steam, and II effect forced-circulation evaporator thermal source is strong using I effect
The indirect steam that circulating evaporator processed is produced, the indirect steam that stripper is produced using II effect forced-circulation evaporator.By I, II
Effect forced-circulation evaporator is configured as a balance and hierarchical system, i.e. front and back end form balance and the pressure and temp change of energy
The hierarchical relationship of change, and the temperature of indirect steam, pressure and the quantity of steam that II effect forced-circulation evaporator is produced should and system
I effect forced-circulation evaporator of front end obtains balance, and the need of work of stripper is met again, meets the weight handled by stripper
Effect after foul condensate amount and treatment reaches requirement, and the temperature of MVR, pressure and value are flat after meeting steam discharge stripper
Weighing apparatus.
The characteristics of present invention utilizes MVR evaporators energy-efficient at low concentrations evaporates large quantity of moisture, with distilled water
Form returns factory flow recycling, and then the solution after preliminary evaporation and concentrating be sent to the forced circulation of two-stage series connection arrangement
Evaporator, only consumes a small amount of energy, just can obtain highly concentrated product, and final evaporation is completed in it；Specific system is set and is matched somebody with somebody
Than after parameter with stripper organic assembling, using stripper process weight foul condensate, its COD content is met industrial water gauge
A kind of standard, so as to realize zero-emission, there is provided sewage water treatment method and device that can solve prior art deficiency, it is energy-efficient.
Verified through theoretical calculation and result of practical application, its operating cost is only the 50% of traditional vapo(u)rization system, equipment investment cost reduction
15%。
The conventional arrangement mode and structure for forced-circulation evaporator are a forced-circulation evaporator by single at present
Heater and vaporization chamber composition, i.e., man-to-man matching way.During using existing conventional arrangement mode, when heater heat exchanger tube
Interior fouling is relatively had a strong impact on when using and shuts down whole vapo(u)rization system, and system temperature is dismantled after returning to relatively low working condition
The bobbin carriage at heater two ends, then carries out mechanical cleaning by heat exchanger tube using mechanical system by root.This structure configuration and cleaning
Although mode can reach cleaning performance, cleaning labour intensity is big, the time is long, expense and people that long-time system-down is caused
Power cost many burdens for enterprise increased, start consumed steam, electric power etc. is sufficiently expensive every time, increased system operation
Cost, reduces the effective rate of utilization of equipment.The present invention shares a structure for vaporization chamber using two heaters of homalographic
The matching way of allocating method, i.e., two couple, solving fouling cleaning needs the defect of system-down.In practical operation, when
When heat exchanger tube fouling has a strong impact on heat exchange, only wherein one heater need to be switched to cleaning model, using the hot water in system
Online wash cycles, and another heater is in normal working condition, now running efficiency of system decreases, but
Can also normal work, meet the basic need of production, and cleaning need not send and manually remove device for disassembling, scavenging period is shorter, clear
Wash that mode is simple, state continuous, relative to the loss caused by system-down, can almost disregard.Cut after line fast cleaning
Enter to working environment, that is, complete cleaning process.
Additionally, any switching laws can also go out one and do online clear from I, II effect forced circulation heater in the present invention
Wash.So will be more convenient to use.
The present invention due to the heating chamber of each forced-circulation evaporator is employed into horizontal installation form, and in heating chamber
The deflection plate self-assembling formation for adding is provided with pass partition from vapour structure, and in it, heat exchanger tube can be pressed into certain in length direction
Area ratio be divided into multiple regions, when heat source stream enter into heating chamber participate in heat exchange when, due to the stop of deflection plate
Effect, will be in heating chamber along the full of twists and turns flowing of axis, because the boiling point of saturated vapor is higher than organic volatile.
The method of the present invention have the advantages that can high-efficiency low energy consumption be located in reason industrial wastewater, with the high thermal efficiency, can
To greatly reduce discharge and the greenhouse gases effect of pollutant.
Equipment of the invention can realize the method for the present invention, and have the following advantages that：
1）It is capable of achieving the method for the present invention；
2）It is capable of achieving efficiently and effectively to process waste water；
3）Can make that stop cleaning time of equipment greatly shortens and equipment cleans simpler again；
4）Equipment cost can to greatest extent be reduced.
Brief description of the drawings
Accompanying drawing 1 is present device and system connection diagram.
Accompanying drawing 2 is the connection diagram of mesohigh motor of the present invention, gear-box and vapour compression machine.
Accompanying drawing 3 is the partitioned organization schematic diagram of MVR heat exchange elements of the present invention.
In figure：1 is thin phenol water groove, and 2 is thin phenol water feeder sleeve, and 3 is thin phenol water collecting pipe, and 4 is warm water collecting pipe, and 5 is clear
Water supply pipe, 6 is the light foul condensate outlet of black liquor preheater, and 7 is black liquor preheater, and 8 is surface condenser, and 9 do not coagulate for MVR
Gas outlet, 10 is MVR evaporators, and 11 is MVR secondary steam pipes, and 12 enter MVR control valves, 13 for stripper steam outlet pipe
It is stripper steam outlet pipe, 14 is vapour compression machine, and 15 is adjustment condenser, and 16 enter to adjust cold for stripper steam outlet pipe
Condenser control valve, 17 is adjustment condenser condensate water pot, and 18 is that stripper adjusts condensing water inlet pipe, and 19 is stripper, 20
It is II effect forced-circulation evaporator indirect steam outlet, 21 is II effect forced-circulation evaporator vaporization chamber, and 22 is that II effect is forced
Circulating evaporator heating chamber（1）, 23 is I effect forced-circulation evaporator secondary steam pipe, and 24 is I effect forced-circulation evaporator evaporation
Room, 25 is I effect forced-circulation evaporator heating chamber（1）, 26 is live steam pipe, and 27 is cleaning condensate water pot, and 28 is cold for cleaning
Solidifying water outlet pipe, 29 is dope discharge nozzle, and 30 is dope discharging control valve door, and 31 is cleaning condensate draining, and 32 is that I effect is forced
Circulating evaporator circulating pump, 33 is the II effect light foul condensate outlet pipe of forced-circulation evaporator, and 34 is II effect forced-circulation evaporation
Device condensate water pot, 35 is I, II effect punishment in advance control valve, and 36 is II effect forced-circulation evaporator circulating pump, and 37 is MVR, II imitated
Material control valve, 38 is concentrated black liquid groove, and 39 is the light foul condensate outlet of stripper, and 40 attach most importance to foul condensate heater, and 41 are
Stripping tower weight foul condensate inlet tube, 42 is adjustment condensate pump, and 43 is the light foul condensate outlet of heater, and 44 is light dirty cold
Solidifying tank, 45 is the light foul condensate pumps of MVR, and 46 is the light foul condensate tanks of MVR, and 47 is vapour compression machine steam outlet pipe, and 48 are
The light foul condensate discharge pipes of MVR, 49 is steam vacuum tank, and 50 sumps of attaching most importance to go out water pump, and 51 attach most importance to foul condensate groove, and 52 attach most importance to
Foul condensate groove oral siphon, 53 is MVR evaporator circulating pumps, and 54 is MVR evaporator circulation fluid outlets, and 55 is black liquor preheater
Light sewage inlet pipe, 56 is MVR weight foul condensate pumps, and 57 is MVR weight foul condensate tanks, and 58 is preheater black liquid outlet pipe, 59
It is MVR live steam air-supplying valves, 60 is II effect forced-circulation evaporator heating chamber（1）Circulation fluid entrance cutting-off valve, 61 are
II effect forced-circulation evaporator heating chamber（1）Circulation fluid outlet, 62 is II effect forced-circulation evaporator heating chamber（1）Cleaning fluid
Entrance cutting-off valve, 63 is II effect forced-circulation evaporator heating chamber（2）, 64 is II effect forced-circulation evaporator heating chamber（2）
Circulation fluid entrance cutting-off valve, 65 is II effect forced-circulation evaporator heating chamber（2）Circulation fluid outlet, 66 is that II effect pressure is followed
Ring evaporator heating chamber（2）Filter washing water inlet cutting-off valve, 67 is II effect forced-circulation evaporator heating chamber cleaning liquid pipe, and 68 are
I effect forced-circulation evaporator heating chamber（1）Circulation fluid entrance cutting-off valve, 69 is I effect forced-circulation evaporator heating chamber（1）Follow
Ring liquid outlet, 70 is I effect forced-circulation evaporator heating chamber（1）Filter washing water inlet cutting-off valve, 71 is that I effect forced circulation is steamed
Hair device heating chamber（2）, 72 is I effect forced-circulation evaporator heating chamber（2）Circulation fluid entrance cutting-off valve, 73 is that I effect pressure is followed
Ring evaporator heating chamber（2）Circulation fluid outlet, 74 is I effect forced-circulation evaporator heating chamber（2）Filter washing water inlet stop valve
Door, 75 is I effect forced-circulation evaporator heating chamber cleaning liquid pipe, and 76 is 10KV high-voltage motors, and 77 is gear-box, and 78 is fixed gas
Outlet, 79 is stripping tower top steam inlet, and 80 is MVR weight foul condensate outlets, and 81 is MVR main steam inlets, and 82 is that MVR is light
Foul condensate is exported；83 is the light foul condensate area of MVR heating element heaters；84 is MVR heating element heaters stripping segmentation soldering line；85 are
MVR heating element heaters weight foul condensate area.
Specific embodiment
The present invention uses MVR system support two-stage forced-circulation evaporations with reference to accompanying drawing to process paper industry black liquor waste
The embodiment of device is explained.
In sewage water treatment method of the present invention and apparatus system, black liquor waste is received from washing room by thin phenol water first
Collector 3 is collected into thin phenol water groove 1, is then conveyed by water pump and is entered into black liquor preheater 7 by thin phenol water feeder sleeve 2, with
Heat exchange is produced from the light foul condensate of MVR evaporators 10, so as to thin phenol water is heated into uniform temperature, to carry out concentration and evaporation
Preliminary condition is created, and light foul condensate is then reduced to certain temperature by heat exchange, makes full use of its heat energy.After being heated
Thin phenol water is entered into MVR evaporators 10 by preheater black liquid outlet pipe 58, starts MVR evaporators circulating pump 53, MVR evaporations
Thin phenol water in device 10 is circulated from bottom to heat exchange element top in evaporator, and forms liquid on each heat exchange element surface
Film.MVR live steams air-supplying valve 59 is opened, to conveying fresh steam, steam and heat exchange element in heat exchange element plate chamber
Fully there is heat exchange in the liquid film on surface, the thin phenol water in MVR evaporators 10 is constantly heated, and then reaches fluidized state, from
Substantial amounts of indirect steam is produced in thin phenol water.MVR live steam air-supplying valves are closed while opening 10KV high-voltage motor 76
The output shaft rotation of 59,10KV high-voltage motor 76, drives gear-box 77, by gear-box 77 by the rotation speed change of 10KV high-voltage motors 76
Rotating speed for needed for vapour compression machine 14, and high-voltage motor mechanical torque is transmitted, the secondary steaming that black liquor is produced in MVR evaporators 10
Vapour is entered into vapour compression machine 14 by MVR secondary steam pipes 11, and vapour compression machine 14 is provided with 10KV high-voltage motors 76
Mechanical work is compensation, consumes mechanical energy, is worked using reverse Carnot cycle mode, is absorbed heat from low temperature environment around, will be entered
The indirect steam temperature and pressure entered in it is raised, and changing for MVR evaporators 10 is returned to by vapour compression machine steam outlet pipe 47
In thermal element plate chamber, fully there is heat exchange with the liquid film on heat exchange element surface and undergo phase transition, respectively become light foul condensate and
Weight foul condensate, wherein light foul condensate is sent in the light foul condensate tanks 46 of MVR temporarily by the light foul condensate discharge pipes 48 of MVR
Deposit, black liquor preheater 7 is delivered to by the light foul condensate pumps 45 of MVR, thin phenol water is heated, be stored in gently after making full use of its waste heat
Direct reuse in foul condensate groove 44；Weight foul condensate is drained into MVR weight foul condensates tank 57, is produced together with surface condenser 8
Raw weight foul condensate is sent to pending in weight foul condensate groove 51 by MVR weight foul condensates pump 56 in the lump.And MVR evaporators
Liquid in 10 is heated boiling again, produces new steam, then through vapour compression machine compressed action, returns in heat exchange element and occur
Heat exchange, reciprocation cycle completes evaporation process.In the middle of normal operation thereafter, when generally vapour compression machine works
The initial steam of boiler offer is not used, MVR systems will circulate voluntarily, reduce boiler combustion process, it is to avoid smoke evacuation, blowdown
Deng pollution, disposal of pollutants and the greenhouse gas produced during primary energy consumption are also reduced and reduced while energy-saving
Bulk effect.Carnot's cycle efficiency is very high, so high-quality, the thermal source of high energy position just can be only obtained with a small amount of mechanical work, because
This its thermal efficiency is high, and energy conservation and consumption reduction effects are obvious.
Pending black liquor waste is constantly concentrated in MVR evaporators 10, is separated into substantial amounts of condensed water and is lacked by evaporation
The higher concentration waste liquid of amount.The characteristics of MVR evaporator operational efficiency is high, use cost is low is so taken full advantage of, by major part
Liquid waste processing is completed in MVR evaporators.Now waste liquid total amount very little.
MVR, II effect punishment in advance control valve 37 is opened to be given up to the black liquor for injecting higher concentration in II effect forced-circulation evaporator
Water, while opening II imitates forced-circulation evaporator circulating pump 36, will be steamed by evaporation dope forced circulation by II effect forced circulation
There is heat exchange in the heat exchanger tube of hair device heating chamber 22,63, the indirect steam provided with I effect forced-circulation evaporator, be heated to boiling
The black liquor of point temperature enters into rapid generation indirect steam after II effect forced-circulation evaporator vaporization chamber 21, and black liquor is by further dense
Contracting.The indirect steam that I effect forced-circulation evaporator is provided forms light foul condensate after there is heat exchange, is temporarily stored into II effect and forces to follow
Ring evaporator condensation water pot 34, light foul condensate groove is sent to by the II effect light foul condensate outlet pipe 33 of forced-circulation evaporator
Direct reuse in 44.
Open, II imitates punishment in advance control valve 35, and the night waste water that II imitates after forced-circulation evaporator concentrate is sent into I effect
In forced-circulation evaporator, while opening I imitates forced-circulation evaporator circulating pump 32, I will be passed through by evaporation dope forced circulation
, there is heat exchange with the live steam that live steam pipe 26 is provided in the heat exchanger tube of effect forced-circulation evaporator heating chamber 25,71, plus
Heat to the black liquor of boiling temperature enters into rapid generation indirect steam after I effect forced-circulation evaporator vaporization chamber 24, and black liquor is entered
One step is concentrated, so as to reach normal concentration.The live steam that live steam pipe is provided forms cleaning condensed water after there is heat exchange,
Be temporarily stored into cleaning condensate water pot 27, by clean condensating water outlet tube 28 be sent to cleaning condensate draining 31 in direct reuse.
The mode of forced-circulation evaporation is employed in the present invention due to subsequent treatment, is followed by the dependence that circulates of evaporation liquid
The additionaling power of ring pump makes to be evaporated liquid with speed forced flow higher in heater heat exchanger tube, and heater is only as heating
Process, and evaporate separation process is carried out in vaporization chamber, so as to reach resistance to salting-out, the purpose of ant-scaling.
Dope discharging control valve door 30 is opened, the concentrated black liquid that will be concentrated to normal concentration is sent to by dope discharge nozzle 29
In concentrated black liquid groove 38, and then harmless treatment is done using burning, and make full use of its heat to be generated electricity or other heat energy utilizations.
Having a certain amount of pollutant during due to evaporation can enter into indirect steam, and these pollutants are mostly with organic matter
Form is present, with low boiling, volatile characteristic, in most remaining in weight foul condensate at last, it is impossible to be directly industrial production institute
Utilize.To make time condensation water reach the purpose of direct circulation recycling, will be stored in weight foul condensate groove 51 in the present invention
Weight foul condensate water pump 50 gone out by weight sump be delivered to weight foul condensate heater 40, the light dirt produced with stripper 19
There is heat exchange in condensed water, weight foul condensate is heated to certain temperature, and doing separating treatment to enter into stripper creates
Condition, make use of system heat energy.
Weight foul condensate after being heated is sent to stripper 19, stripper 19 by stripping tower weight foul condensate inlet tube 41
Using float valve tray structure, its principle is that the equilibrium relation of gas-liquid two-phase in weight foul condensate is destroyed using steam and one is set up
New vapor liquid equilibrium state is planted, the organic components in weight foul condensate is desorbed due to partial pressure reduction, tend to setting up
A kind of new equilibrium relation, makes a large amount of organic pollutions be spread in gas phase, so as to reach gas-liquid phase separation purpose.The dirty condensation of weight
Under water is drenched by the top of stripper, the indirect steam from II effect forced-circulation evaporator is by II effect forced-circulation evaporator two
By not entering under stripper 19, the steam of rising meets secondary steam outlet pipe 20 with the heavy sewage for declining in stripper, steam
Impact jack-up float valve, carries out mass transfer on tower tray, and the sewage after stripping purification is cold as the light dirt that can be used for industrial process waters
Solidifying water, weight foul condensate heater 40 is entered into by the light foul condensate outlet 39 of stripper, will be sent after weight foul condensate heating
Enter the direct reuse in light foul condensate groove 44.
The steam that stripper of the present invention 19 is utilized is the indirect steam produced by II effect forced-circulation evaporator, wherein II
Indirect steam produced by effect forced-circulation evaporator undergoes phase transition due to participating in heat exchange with weight foul condensate, and part forms light
Foul condensate, some vapor of residual is acted on for stripping, is discharged by stripper top, flows through stripper steam outlet pipe 13,
Thermal loss for supplementing MVR evaporators 10, remaining stripped vapor is cooled down by adjusting condenser 15, eventually becomes weight dirty cold
Solidifying water, is temporarily stored into adjustment condenser condensate water pot 17, and stripper 19 is sent to by adjustment condensate pump 42, qualified through stripping treatment
Afterwards from the light discharge of foul condensate outlet 39 reuse of stripper.
Whole system configuration is done balanced design by the present invention, wherein the indirect steam produced by II effect forced-circulation evaporator
Amount and the quantity of steam balance unification needed for stripper, temperature and pressure balance unification.Produced by II effect forced-circulation evaporator
Indirect steam part is used to, with weight foul condensate heat exchange, form light foul condensate, and most of steam of residual is used for stripping,
By the discharge of the top of stripper 19.The steam of the top of stripper 19 discharge does quantity of steam, pressure and temperature and puts down with MVR evaporators 10 again
Weighing apparatus design, the chain type that formation energy fully, is continuously utilized is equipped with structure, effectively improves utilization rate of the energy in system.This hair
It is 0.015MPa that the steam working pressure (SWP) in the heat exchange element of MVR evaporators 10 is set in bright system, 103 DEG C of operating temperature, accordingly
It is operating pressure 0.015MPa, 103 DEG C -104 DEG C of operating temperature, II effect to reach condition needed for the stripper 19 of system balancing operation
The operating pressure 0.028MPa of forced-circulation evaporator flash chamber 21,106 DEG C of operating temperature, system pressure is matched completely, energy
Amount is fully used.
The combustable organic gas for removing steam moisture in adjustment condenser 15 and surface condenser 8 send burning to process, profit
Its heat energy is used, resource circulation utilization and wastewater zero discharge is realized.
The heat exchange element of MVR evaporators 10 is set to heat transfer zone and stripping zone by the present invention, and heat transfer zone sets the main decatizes of MVR and enters
The light foul condensate outlets 82 of 81 and MVR of mouth, a big header is formed on bottom；Stripping zone sets stripping tower top steam inlet 79 and not
Solidifying gas outlet, MVR weights foul condensate outlet 80, middle part form overhead vapours entrance and weight foul condensate outlet header, top shape
Into fixed gas outlet header, fixed gas outlet 78 is attached to, and two peculiar knots of header are continuously set as stripping zone
Structure.By vapour compression machine 14 heat up pressurization after main steam entered into inside heat exchange element from bottom, this region exchange heat after shape
Into light foul condensate, discharged from the light foul condensate outlets 82 of MVR；Middle part is entered containing a large amount of low by stripping tower top steam inlet 79
The stripping overhead vapours of boiling point, volatile organism matter, for supplementing the thermal loss of MVR evaporators and as supplemental heat source,
Separated in stripping zone after heat exchange and attached most importance to foul condensate and imflammable gas, the mixture containing steam and imflammable gas from
MVR stripping zones top fixed gas outlet 78 is discharged, and send burning to make nothing after surface condenser 8 and adjustment condenser 15 are cooled down
Evilization treatment and reuse heat energy, weight foul condensate are discharged from MVR weights foul condensate outlet 80, reach good separating effect.
Substantially, influence using effect is, it is necessary to when cleaning, make following steps and realize for scale formation during equipment use
Line cleaning is shut down without total system.Forced-circulation evaporator heating chamber is imitated if desired for cleaning II（1）22, then need closing II
Effect forced-circulation evaporator heating chamber（1）Circulation fluid entrance cutting-off valve 60, opens II and imitates forced-circulation evaporator heating chamber（1）
Filter washing water inlet cutting-off valve 62, now black liquor circulation line is cut-off, and light foul condensate is by II effect forced-circulation evaporator
Heating chamber cleaning liquid pipe 67 enters into II effect forced-circulation evaporator heating chamber（1）In 22, the flowing flush clean of clear water is realized,
And II effect forced-circulation evaporator heating chamber（2）63 are in underrun, solve also in normal working condition, system
Cleaning needs the overall deficiency shut down.The on-line cleaning of other heaters can similarly be realized.
Present system uses intellectuality DCS control systems, and the closing of valve, the unlatching of pump are completed by preset program,
Productivity ratio has been liberated, operating efficiency has been improve.Due to the negligible amounts such as equipment, valve in the present invention, so controlling unit is less,
Automatically control degree high.
Heater is divided into two regions, bottom sets dividing plate in apparatus casing along this region, and two circulating pumps make respectively
Liquid independent loops flowing from region.Thin liquid is first into one of working region, is heated in this region
Another region is entered into after to boiling point and then from bottom baffles.This is due to the usually less than equipment operation evaporation of feeding liquid temperature
Boiling temperature, if only with single area, the feeding liquid of low temperature will reduce the device interior solution temperature short time, less than boiling
Point temperature, at this moment indirect steam no longer occur, thermal source is interrupted, and system is by autostop.And after two regions are set, feed zone
Temperature reduction, evaporation stops, and another regional evapotranspiration continues, stabilization is carried out, it is ensured that the steam generating amount of bottom line, according to
By system balancing effect gradually recover normal operating condition, so as to ensure that equipment continue, stable operation.MVR vapo(u)rization systems are worked as
Concentration is discharged after reaching technological requirement by discharging pump, and system increases material supply from trend evaporator.
Claims (9)
1., be preheating to pending sewage after design temperature to send into first and carry out in MVR evaporators by a kind of sewage water treatment method
It is concentrated by evaporation, respectively obtains the liquid and indirect steam of concentration, after the concentrate concentration in MVR evaporators reaches predetermined value
To liquid to be treated, liquid to be treated introduces forced-circulation evaporator and carries out re-evaporation concentration, makes concentrated liquid further after concentration point
The sewage and indirect steam not concentrated again, the light foul condensate that the indirect steam in forced-circulation evaporator is formed are delivered to gently
Foul condensate groove direct reuse, it is characterised in that：MVR shapes in MVR evaporators through the steam after vapour compression machine intensification pressurization
Into light foul condensate, the light foul condensate is drawn from MVR evaporator heat exchange elements and is used as the heat exchange of heating treatment sewage
Directly returned after thermal source and used, remaining gas carries out steam stripping, form the mixture of weight sewage and fixed gas, fixed gas it is mixed
Compound forms weight sewage after condensing again and treats further treatment；Liquid to be treated at least carries out effect forced-circulation evaporation treatment,
The final concentrated liquid of the technological requirement for obtaining, liquid to be treated is through the indirect steam of forced-circulation evaporation treatment generation as power
Medium carries out liquid stripping；The indirect steam discharged after being stripped through liquid obtains the dirty solidifying water of weight and steam stripping shape through steam stripping
Liquid stripping is carried out after into weight sewage mixing.
2. sewage water treatment method according to claim 1, it is characterised in that imitate above forced-circulation evaporations treatment using two,
Wherein I effect forced-circulation evaporation thermal source uses live steam, the indirect steam that previous effect forced-circulation evaporation treatment is produced to be used as
The evaporation thermal source of latter effect forced-circulation evaporation, the indirect steam that final effect forced-circulation evaporation treatment is produced is used as liquid vapour
The dynamic medium for carrying.
3. the device that the sewage water treatment method described in claim 1 is used, including：Successively mutually with the preheating of pipeline serial communication
Device, MVR, forced-circulation evaporator, the cold of pipeline connection is used with foregoing each preheater, evaporator, heater, vaporization chamber respectively
Solidifying water pot, the vapour compression machine of MVR, and it is arranged at pump and valve, control system on MVR, each condensate water pot, heating chamber pipeline
System, it is characterised in that：Pipeline connection is used between the indirect steam of MVR evaporators and the entrance of vapour compression machine；Vapour compression machine
Pipeline connection is used between the indirect steam entrance of outlet and steam vacuum tank；The live steam entrance and live steam of steam vacuum tank
Pipe network is connected, there is provided is started steam, is connected with pipeline between steam vacuum tank and MVR heaters；Forced-circulation evaporator is heated
The fixed gas outlet of room is connected with vaporization chamber；The condensating water outlet tube of forced-circulation evaporator heating chamber is condensed with cleaning respectively
Water pot is connected；Pipeline connection is used between the indirect steam outlet of forced-circulation evaporator and the steam inlet tube of liquid stripper；
Whole heat exchange area is divided into top for one stripping zone heavy contraminated zone and bottom are set in the heat exchange element of the evaporator of MVR
Light contraminated zone, wherein：With pipeline connection, weight contraminated zone between the top in weight contraminated zone and the fixed gas inlet tube of surface condenser
Bottom and liquid stripper steam outlet pipe and weight dirt drainer between use pipeline connection respectively；Weight foul condensate heater
Weight outlet of sewer is connected with the heavy sewage inlet on liquid stripper top, and the light foul condensate outlet of liquid stripper is dirty with weight
Pipeline connection is used between condensing the light foul condensate inlet tube of water heater, the heavy sewage inlet of weight foul condensate heater is dirty with weight
Pipeline connection is used between condensate draining, is connected with pipeline between the light foul condensate outlet for the treatment of sewage preheater and light foul condensate groove
It is logical；Surface condenser warm water outlet and cooling water inlet respectively be that warm water collecting pipe and clear water supply pipe are connected, surface is cold
The condensation-water drain of condenser and weight foul condensate tank pipeline connection；The liquor inlet and material liquid outlet for the treatment of sewage preheater
Be connected with treatment sewage feeder sleeve and MVR evaporator circulating pumps respectively, the condensing water inlet for the treatment of sewage preheater and
Condensation-water drain is respectively communicated with the light foul condensate tank and light foul condensate groove of MVR.
4. the device that the sewage water treatment method described in claim 2 is used, including：Successively mutually with the preheating of pipeline serial communication
Device, MVR, forced-circulation evaporator, the cold of pipeline connection is used with foregoing each preheater, evaporator, heater, vaporization chamber respectively
Solidifying water pot, the vapour compression machine of MVR, and it is arranged at pump and valve, control system on MVR, each condensate water pot, heating chamber pipeline
System is constituted, it is characterised in that：Pipeline connection is used between the indirect steam of MVR evaporators and the entrance of vapour compression machine；Both vapor compression
Pipeline connection is used between the outlet of machine and the indirect steam entrance of steam vacuum tank；The live steam entrance of steam vacuum tank with it is fresh
Steam pipe system is connected, and is connected with pipeline between steam vacuum tank and MVR heaters；The fixed gas of forced-circulation evaporator heating chamber
Outlet is connected with vaporization chamber；The condensating water outlet tube of forced-circulation evaporator heating chamber is connected with cleaning condensate water pot respectively；Ⅰ
Effect forced-circulation evaporator is connected with live steam pipe, and secondary steam pipe and the latter effect of previous effect forced-circulation evaporator are forced
The heater of the evaporator of circulating and evaporating is connected, the secondary steam pipe and liquid stripper of final effect forced-circulation evaporator
Pipeline connection is used between steam inlet tube；A gas stripping zone is set in the heat exchange element of the evaporator of MVR will entirely exchange heat
Region is divided into the heavy contraminated zone on top and the light contraminated zone of bottom, wherein：The weight top in contraminated zone and not coagulating for surface condenser
Distinguished between pipeline connection, the steam outlet pipe of the bottom in weight contraminated zone and liquid stripper and weight dirt drainer between gas inlet tube
Use pipeline connection；The heavy outlet of sewer of weight foul condensate heater is connected with the heavy sewage inlet on liquid stripper top, liquid
Pipeline connection is used between the light foul condensate outlet of stripper and the light foul condensate inlet tube of weight foul condensate heater, weight is dirty
Condense and pipeline connection is used between the heavy sewage inlet of water heater and weight foul condensate groove, the light dirty condensation for the treatment of sewage preheater
Pipeline connection is used between water out and light foul condensate groove；Surface condenser warm water outlet and cooling water inlet respectively be warm water
Collecting pipe is connected with clear water supply pipe, condensation-water drain and the weight foul condensate tank pipeline connection of surface condenser；It is pending
The liquor inlet and material liquid outlet of sewage preheater are connected with treatment sewage feeder sleeve and MVR evaporator circulating pumps respectively,
The condensing water inlet and condensation-water drain for the treatment of sewage preheater are respectively communicated with the light foul condensate tank and light foul condensate of MVR
Groove.
5. the device according to claim 3 or 4, it is characterised in that forced-circulation evaporator it is bright using two homalographics plus
Hot device shares a structure allocating method for vaporization chamber.
6. the device described in claim 5, it is characterised in that the top of the evaporator heat exchange element of MVR evaporating area is welded along L-shaped
Close and form a stripping segmentation soldering line, evaporating area is stripped segmentation soldering line and be divided into superposed stripping zone and be located at down
The light foul condensate area in portion.
7. device according to claim 6, it is characterised in that the stripping zone area of the evaporator heat exchange element of MVR accounts for evaporation
The 10-20% of area's plate gross area.
8. the device described in claim 7, it is characterised in that set on the pipeline of the introducing condensed water of each condensate water pot of device
There are at least one U section, the bottom of the bottom less than condensate water pot of its U-shaped.
9. the device described in claim 8, it is characterised in that the heating chamber of each forced-circulation evaporator is horizontally disposed with.
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| CN105536276B (en) * | 2016-02-05 | 2017-08-08 | 兰州节能环保工程有限责任公司 | A kind of MVR multi-stage evaporation units |
| CN105906123B (en) * | 2016-05-26 | 2018-06-19 | 苏州派宁环保科技有限公司 | The system and method for processing wastewater from chemical industry based on stripping and MVR group technologies |
| CN106241887A (en) * | 2016-07-20 | 2016-12-21 | 山东好帮环保科技有限公司 | A kind of chemical plant waste hydrochloric acid comprehensive utilization treatment process and special MVR evaporation concentrator thereof |
| CN107473294B (en) * | 2017-08-31 | 2024-01-26 | 上海晟兰石化工程技术有限公司 | Treatment process and treatment system for tower bottom liquid of acrylonitrile recovery tower |
| CN108217794A (en) * | 2018-03-22 | 2018-06-29 | 兰州节能环保工程有限责任公司 | It is a kind of can simultaneously a variety of waste liquids of crystallization treatment method and device |
| CN108622971B (en) * | 2018-05-30 | 2021-04-16 | 哈尔滨理工大学 | MVR energy-saving environment-friendly sewage treatment system utilizing new energy |
| CN109147982B (en) * | 2018-10-12 | 2023-10-31 | 一重集团大连工程技术有限公司 | Nuclear power plant low-emission wastewater MVC evaporation process and device thereof |
| CN111994980A (en) * | 2020-08-20 | 2020-11-27 | 广东闻扬环境科技有限公司 | Sewage treatment system |
| CN113325028B (en) * | 2021-06-07 | 2022-05-24 | 中国核动力研究设计院 | Boiling critical experiment device for unstable flow of natural circulation system and control method |
| CN114477336A (en) * | 2022-01-29 | 2022-05-13 | 广西大学 | Chemical pulping black liquor concentration system and method for reducing evaporation energy consumption by using MVR |
| CN115010316A (en) * | 2022-04-21 | 2022-09-06 | 爱拓环保能源(浙江)有限公司 | Treatment process of papermaking waste |
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